TW201437615A - Calibration system and method for display color analyzer - Google Patents

Abstract

The present invention provides a calibration system for a display color analyzer, which comprises: an integrating sphere, which is configured with three red, blue and green light sources and an opening; a spectrum analyzer for measuring the optical spectrum at the opening; and, a circuit control unit for controlling the three red, blue and green light sources. Thus, a first standard value may be obtained from the optical spectrum of red, blue and green; and a second standard value may be obtained by adjusting the light strength of the three red, blue and green light sources according to the first standard value. A display color analyzer under test is provided at the opening for measuring and thus obtaining an indication value; and, the difference between the second standard value and the indication value is utilized for calibration of the display color analyzer under test. Thus, the present invention may rapidly and precisely complete the optical calibration of a display color analyzer under test.

Description

Color analyzer calibration system and method

The present invention relates to an instrument calibration system and method, and more particularly to a color analyzer calibration system and method.

The display color analyzer is an essential instrument for calibrating the chromaticity coordinates and luminance of a liquid crystal display (LCD); it can also be used for a light emitting diode. , LED) verification, is an important part of the production control of the optoelectronic industry, its accuracy will affect the quality of the product. At present, regarding the color analyzer calibration technology, the main method is to input a test image signal to a preset display by using a signal generator, and the preset display is defined as a standard display, and the color analyzer to be corrected measures the color temperature of the standard display. (color temperature) device display value, and compared with the standard value of the standard display color temperature, to obtain a color temperature difference, and then adjust the color temperature coordinate of the color analyzer by the color temperature difference value value.

The above method only performs correction for the color temperature test image of white light, and cannot guarantee whether the remaining chromaticity coordinates in the chromaticity diagram are also accurate, and the test image generated by the display has the doubt of uniformity, and it is difficult to adjust the chromaticity coordinates. To meet high color rendering (color rendering Index) needs to use signal generators, memory modules, and high cost disadvantages of computer control.

Therefore, the correction is performed only by the color temperature test image of white light, which does not meet the current quality control requirements of the industry, and the remaining chromaticity coordinates in the chromaticity diagram must be ensured to be accurate. Therefore, it is extremely necessary in the industry to develop a color analyzer calibration method and system, which can simultaneously correct the brightness and chromaticity coordinates of the color analyzer to be tested, so that the cost and the time effect can be simultaneously achieved, and the color analysis can be completed quickly and accurately. Calibration of the instrument.

In view of the above disadvantages of the prior art, the main object of the present invention is to provide a color analyzer calibration system and method, integrating a spectrum analyzer, an integrating sphere, a circuit control unit, etc., to quickly and accurately complete the calibration of the color analyzer. .

In order to achieve the above object, according to one aspect of the present invention, a color analyzer calibration method is provided, the steps comprising: (A) providing an integrating sphere provided with three red, blue and green light sources, using a spectrum analyzer One of the integrating spheres respectively measures the spectrum of red, blue and green light; (B) obtains a first standard value from the red, blue and green light spectrum, and adjusts the red, blue and green according to the first standard value The light intensity of the three light sources obtains a second standard value (C) to provide a color analyzer to be measured at the opening to obtain a device value; (D) according to the difference between the second standard value and the device value Adjust the color analyzer to be tested.

The above is provided with an integrating sphere of red, blue and green light sources, the red, The blue and green light sources may be disposed on the integrating sphere wall or in any area inside the integrating sphere, wherein the three light sources such as blue light, green light, and red light may be light emitting diodes or laser light sources, but not limited thereto. The wavelength range is selected to be a blue light wavelength range: 455 nm to 490 nm, a green light wavelength range: 515 to 570 nm, and a red light wavelength range: 625 to 720 nm. The three primary color light sources of the present invention are electrically connected to a control circuit unit. The power supply can be provided by the control circuit unit, and at the same time, the brightness or chromaticity coordinates of the red, blue and green light sources can be controlled to provide test color signals including different chromaticity coordinates and brightness, or can be borrowed The number of different red, blue and green light sources is controlled to change the test color signal.

In step (B), the spectrum of red, blue and green light can be measured by using a spectrum analyzer, and an algorithm can be used to convert the measured red, blue and green light spectrum into a first standard by the algorithm. a value, wherein the first standard value includes optical data such as chromaticity coordinates and brightness; and a second standard value obtained by adjusting light intensities of the red, blue, and green light sources via the first standard value, the second standard value Optical data such as chromaticity coordinates and brightness are also included.

In the above, the red, blue and green light sources are controlled by a circuit control unit. Therefore, the step (B) may further comprise a step of adjusting the light intensity of the three red, blue and green light sources by varying the number of the red, blue and green light sources or the current value of the circuit control unit.

In order to achieve the above object, according to another aspect of the present invention, a color analyzer calibration system is provided, comprising: an integrating sphere, setting There are red, blue and green light sources inside, the integrating sphere is provided with an opening; a spectrum analyzer is used for measuring the light spectrum at the opening; and a circuit control unit for controlling the red, a blue and green light source; thereby obtaining a first standard value from the red, blue, and green light spectrums, and adjusting a light intensity of the red, blue, and green light sources according to the first standard value to obtain a second standard a value is obtained by providing a color analyzer to be measured at the opening to obtain an indication value; and comparing the difference between the second standard value and the indication value of the apparatus to adjust the color analyzer to be tested.

The above summary and the following detailed description and drawings are intended to further illustrate the manner, means and effects of the present invention in achieving its intended purpose. Other purposes and advantages of this creation will be explained in the following description and drawings.

110, 210 ‧ ‧ integral ball

111, 211‧‧‧Red, blue and green light sources

112, 212‧‧‧ openings

120‧‧‧ spectrum analyzer

130, 230‧‧‧ circuit control unit

220‧‧‧ a color analyzer to be tested

The first figure is a schematic diagram of a color analyzer calibration system of the present invention.

The second figure is a schematic diagram of the operation of a color analyzer calibration according to the present invention.

The embodiments of the present invention are described by way of specific examples, and those skilled in the art can readily understand the advantages and effects of the present invention from the disclosure of the present disclosure.

Please refer to the first figure, which is a color analyzer of the present invention. A schematic diagram of the positive system. As shown in the figure, the present invention provides a color analyzer calibration system, comprising: an integrating sphere 110, three red, blue and green light sources 111 are disposed therein, and an integrating opening 112 is provided on the integrating sphere; Is used to measure the light spectrum at the opening 112; a circuit control unit 130 for controlling the red, blue, and green light sources 111; thereby, obtained from the red, blue, and green light spectrums a first standard value, adjusting a light intensity of the red, blue, and green light sources 111 according to the first standard value to obtain a second standard value; providing a color analyzer to be measured at the opening 112 to obtain a device The value is displayed; the difference between the second standard value and the value of the device is compared to adjust the color analyzer to be tested.

The integrating sphere 110 is internally provided with a light source 110 of three primary colors of red, blue and green. The three light sources 111 can be disposed on the wall of the integrating sphere 110 or in any area inside the integrating sphere 110. The light source 111 of the red, blue and green primary colors It can be a light-emitting diode or a laser or a plurality of light-emitting diodes or lasers, but not limited thereto. The wavelength range can be selected as the blue wavelength range: 455 nm to 490 nm, and the green wavelength range is 515~. 570nm and red wavelength range: 625~720nm; when the light source 110 of the three primary colors of red, blue and green emits light, the light will be uniformly reflected and scattered in the integrating sphere 110, and the light source of the three primary colors of red, blue and green is not used. The intensity of the output beam and the uniformity are affected by the difference in incident angle, spatial distribution and polarization. Therefore, the light measured from the opening 112 on the integrating sphere 110 is uniform scattered light.

According to the color theory of the International Cormmission for Illumination (Commission Internationale de l'Eclairage, CIE), the curve of the human cone's sensitivity to blue, green and red light can be three colors. Matching function , , Said that the association defines a green light matching function Sensitive function with human eyes (sensitivity function) is consistent. The chromaticity coordinates and brightness of any color signal can simulate the color of the eye cone of the human eye with the three original color matching function. The sensitivity of the color is represented by X , Y , and Z as the tristimulus value. equation: P ( λ ) is the optical spectrum and thus the chromaticity coordinates (x, y) are

z =1 - x - y in this embodiment includes a spectrometer 120, which can be disposed at the opening 112 to measure the red, blue, and green light spectrums of the red, blue, and green primary light sources 111. The red, blue, and green light spectrums of the light source 111 of the red, blue, and green primary colors are P ₁ ( λ ), P ₂ ( λ ), and P ₃ ( λ ), so the three stimulus values are: We can define L ₁ , L ₂ , L ₃ to simplify formula operations Therefore, in this embodiment, the red, blue, and green light spectrums can be combined into any standard chromaticity coordinate and brightness, and the chromaticity coordinates are calculated as follows:

z =1- x - y According to the above algorithm, the spectrum of red, blue and green light measured by the spectrum analyzer 120 can be combined into a first standard value, which includes optical information such as chromaticity coordinates and brightness.

According to the first standard value, the ratio of the luminous intensity of the red, blue, and green light sources 111 can be adjusted, and any standard chromaticity coordinate and brightness in the chromaticity diagram can be combined, and the intensity ratio is transmitted through the current value of the circuit control unit 130 or The number of red, blue, and green light sources 111 is adjusted to perform correction of a color analyzer to be tested; the intensity of red, blue, and green light sources 111 is adjusted, and the red, blue, and green light spectrums P ₁ ( λ ) , P ₂ ( λ ), P ₃ ( λ ) may become a new red, blue, and green light spectrum according to an increase in luminous intensity, for example, when the relative luminous intensity ratio of the red, blue, and green light sources 111 is 1:2:3 When the red, blue, and green light spectrum values become 1 P ₁ ( λ ), 2 P ₂ ( λ ), and 3 P ₃ ( λ ), the converted red, blue, and green light spectrum values are 1 P ₁ ( λ ), 2 P ₂ ( λ ), and 3 P ₃ ( λ ) are substituted into the above algorithm to obtain a new chromaticity coordinate and brightness; therefore, using the above algorithm to calculate, it is known that the adjustment red, The chromaticity coordinates and brightness obtained after the luminous intensity of the blue and green light sources 111, the chromaticity coordinates and brightness are referred to as the second standard value, so the second standard The optical information comprising values of brightness and chromaticity coordinates.

Please refer to the second figure, which is a schematic diagram of the operation of a color analyzer calibration according to the present invention. As shown in the figure, after adjusting the luminous intensity of the red, blue, and green light sources 111, the desired test light source signal can be adjusted, and a color analyzer to be tested 220 can be placed at the opening 212 to measure the light source. The red, blue, and green light source signals 211 chromaticity coordinates and brightness. At this time, the brightness and chromaticity coordinates measured by the color analyzer to be measured by 220 are defined as a display value.

Therefore, the difference between the second standard value and the device value is the error of the color analyzer 220 to be tested. Therefore, when the color analyzer 220 to be tested is adjusted, the measured value of the device is measured. When the second standard value is the same, the color analyzer 220 to be tested is said to complete the correction.

The above-described embodiments are merely illustrative of the features and functions of the present invention and are not intended to limit the scope of the technical content of the present invention. Any person skilled in the art can modify and change the above embodiments without departing from the spirit and scope of the creation. Therefore, the scope of protection of this creation should be as listed in the scope of the patent application described later.

110‧‧·score ball

111‧‧‧Red, blue and green light sources

112‧‧‧ openings

120‧‧‧ spectrum analyzer

130‧‧‧Circuit Control Unit

Claims (10)

A color analyzer calibration method, the steps comprising: (A) providing an integrating sphere provided with three red, blue and green light sources, and measuring a red, blue and green color respectively by using a spectrum analyzer at one opening of the integrating sphere (B) obtaining a first standard value from the red, blue, and green light spectrums, and adjusting a light intensity of the red, blue, and green light sources according to the first standard value to obtain a second standard value; C) providing a color analyzer to be tested to measure the opening to obtain an indication value; (D) adjusting the color analyzer to be tested according to the difference between the second standard value and the indication value of the apparatus. The color analyzer calibration method according to claim 1, wherein the red, blue and green light sources are light emitting diodes or lasers. The color analyzer calibration method of claim 1, wherein the first and second standard values comprise chromaticity coordinates and brightness. The method of color analyzer calibration according to claim 1, wherein the red, blue and green light sources are controlled by a circuit control unit. The method for correcting the color analyzer according to claim 4, wherein the step (B) further comprises a step of using the number of the red, blue, and green light sources or the current value of the circuit control unit to Adjust the light intensity of the red, blue and green light sources. A color analyzer calibration system comprising: An integrating sphere is provided with red, blue and green light sources therein, and the integrating sphere is provided with an opening; a spectrum analyzer is used for measuring the light spectrum of the red, blue and green light sources at the opening; a circuit control unit for controlling the red, blue and green light sources; thereby obtaining a first standard value from the red, blue and green light spectrum, and adjusting the red and blue according to the first standard value And a light intensity of the green three light source to obtain a second standard value; providing a color analyzer to be measured at the opening to obtain an instrument value; comparing the difference between the second standard value and the device value Color analyzer to be tested. The color analyzer calibration system according to claim 6, wherein the red, blue and green light sources are light emitting diodes or lasers. The color analyzer calibration system of claim 6, wherein the red, blue, and green light sources are adjusted by varying the number of the red, blue, and green light sources or the current value of the circuit control unit. brightness. The color analyzer calibration system of claim 6, wherein the red, blue, and green light sources are disposed in the integrating sphere wall or the integrating sphere. The color analyzer calibration system of claim 6, wherein the red, blue and green light sources are electrically connected to the circuit control unit.